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What is the area of a circle with a radius of 3 units?

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Question: What is the area of a circle with a radius of 3 units?

Options:

  1. 9π
  2. 6π
  3. 3π
  4. 12π

Correct Answer: 9π

Solution: 

The area of a circle is given by the formula A = πr². For r = 3, A = π(3)² = 9π.

What is the area of a circle with a radius of 3 units?

Practice Questions

Q1
What is the area of a circle with a radius of 3 units?
  1. 9π
  2. 6π
  3. 3π
  4. 12π

Questions & Step-by-Step Solutions

What is the area of a circle with a radius of 3 units?
  • Step 1: Understand the formula for the area of a circle, which is A = πr².
  • Step 2: Identify the radius of the circle. In this case, the radius (r) is 3 units.
  • Step 3: Substitute the radius into the formula. Replace r with 3 in A = πr².
  • Step 4: Calculate (3)², which is 3 times 3. This equals 9.
  • Step 5: Now, multiply 9 by π. This gives you the area: A = 9π.
  • Area of a Circle – The area of a circle is calculated using the formula A = πr², where r is the radius.
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